Open-hearth furnace



C. C. B UMBAUGH OPEN HEARTH FURNACE Filed April 15. 1922 2 Sheets-Sheet 1 sept. u, 1923. y www? C. C. BUMBAUGH OPEN HEARTH FURNACE Filed April l5. 1922 2 Sheets-Sheet 2 y am? "M Patented Sept. ll, l923.

itil? STATS aaarea'ranr CLYDE C. BUMBAUGH, OF CANTON, OHIO, ASSIGNOR 0F TREE-LEVENTHS T0 A.' DIEKMAN, TWO-ELEVENTHS TO H. A. PLANTZ, ONE-ELEVENTH T0 H. L. GRAY, AND ONE-ELEVENTH TO W. R. DAVIS, ALL OF CANTON, O-IO.

OPEN-HEARTH FENACE.

Application filed April 15, 1922. Serial No. 552,896.

To all w 710m at may concern:

Be it known that I, CLYDE C. BUMBAUGH, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Openllearth Furnace, of which the following is a specification.

This invention relates to that class of furnaces generally known as the tilting open hearth furnace of the regenerative type.

Furnaces of this general character are in use and the common types of tilting furnace are the Heroult and Talbot furnaces. lVith the, common forms of tilting furnaces at present in general use, there are several objections. It is not practical to build these furnaces for much capa-city, the tilting operation is very dificult owing to the construction of the ports forming communication between the regenerative portion of the furnace and the tilting portion, making it necessary with most types of tilting furnace to remove the ports, which are formed separately from the tilting body, before the furnace can be tilted, the means for rocking or tilting the furnace does not assure the tilting body properly registering with the ports when returned to the normal position.

The objects of the present invention are to provide a tilting open hearth furnace which may be built for small capacity; to provide means for tilting the furnace which will assure proper registering with the ports when the furnace is returned to the normal position; to form the ports integral with the tilting body of the furnace, eliminating the necessity of removing the ports before tilting the furnace; to form the entire tilting body and ports within a curved steel shell which allows for expansion and contraction, thus permitting the furnace to be shut down at any time without detriment; to provide a removable lid or cover formed in a single piece to cover the entire tilting body and ports; and to generally improve and simplify furnaces of this type.

The above and other objects may be attained by the construction illustrated in the accompanying drawings, in which- Figure l is a view showing one-half of the furnace in longitudinal section and the other half in side elevation;

Fig. 2, a section on the line 2 2, Fig. l;

Fig. 3, an end elevation; and

steel shell 5 tapered at opposite ends as i shown at 6, the ports 3 being located within the reduced end portions 7 of the shell. A lining of fire brick as shown at 8 is provided within the steel shell.

The usual water seal is provided between the ports and the passages 2 of the regenerative chambers comprising the troughs 9 surrounding said passages rand the lips 10 surrounding the ports and arrangedfto normally be seated within the troughs.

Rails 11 are supported upon the regenerative portion of the furnace at one side of the tilting body 4 and rockers 12 are mounted upon the adjacent side of the tilting body and engage said rails. The tilting body of the furnace may be tilted or rocked upon said rockers in any usual manner to pour the bath from the pouring spout 13.

It will be seen that as the body of the furnace is rocked, the lips 10 will be moved out of the troughs 9, breaking the water seal. The ports 3 being formed integral with the tilting body, will be carried out of engagement with the passages 2 of the regenerative chambers by the tilting of the body 4 and as the body is tilted back to the normal position, the lips 10 will again enter the troughs 9 again forming a water seal at this point.

It will thus be evident that there will be no necessity of removing the ports and relining the same after each tilting of the body 4 and the water seal will be automatically closed as the body is tilted bac-lr to the normal position.

For the purpose of charging the furnace, a removable cover is provided upon the body portion thereof, being shaped to entirely cover the working chamber and the ports. This cover is carried in the structural frame-indicated generally at 14C and is lined with fire brick 4as shown at l5.

A clamping means is indicated at 16 for locking the cover in position during the operation of lthe furnace and it will, of course, be understood that any suitable means may be provided for raising the cover from the heating chamber Whent is necessary to recharge the same.

It will be evident that by providing a removable cover upon the body portion of the furnace, the heating chamber may be considerably" lessened in height, as the furnace ymaythus be charged through the top, thus `obviatingthe necessity of providing a charging door in the side thereof. The cover or top of the heating "chamber may thus be located Jjust above the level of the metal, being. heated therein, vdoing aivay with the considerable amount of dead space above the level of the metal which is ncc-.

v essary in the usual furnace of this character. l

I cla1m: l. An open hearth regeneratve furnace of the Character described including a regenregistering with said leerse? of the character described includinga regenerative chamber, rovided with gas passages in its upper end), a tilting body mounted upon the regenerative chamber and vertical ports formed integral With the `body and registering with said gas passages, and rockers at one side of the tilting body upon which the same is arranged to be tilted, and a Water seal between the gas passages and portsv arranged to be automatically sealed when thc body is tilted into opertive position the rockers being located beyond the extreme edge of the Water seal.

'Y 3. An open hearth regenerative furnace of the character described including a regenerative chamber, provided with gas passages in its upper end, a tilting body mounted upon the regenerative chamber'and vertical ports formed integral with the 'body and registering with said gas passages, and a steel shell enclosing the tilting ybody and ports. f y

e. An open hearth regenerative furnace of the character described including a regenerative chamber, provided With gas passages in its upper end, a tilting body mounted upon the regenerative chamber and vertical ports formed integral with the body and registering With said gas passages, and a removable cover entirely covering the tilting body and ports.

In testimony that I claim the above, I have hereunto subscribed my name.

CLYDE C. BUMBAUGH. 

